K. Singh, Amit, Sudhir Pd. Sinha, Vijay Kumar, S.S. Rai, and S. Sharma. 2011. “Nephelauxatic Effect of Telluro Ether Complexes of Co(II), Ni(II) and Cu(II)”. Asian Journal of Chemistry 23 (10):4347-50. https://asianpubs.org/index.php/ajchem/article/view/10855.